BIM for the Bird's Nest - a case study

The Bird's Nest, officially known as the National Stadium, caused a sensation when it was unveiled in 2008. It is both hated and loved, but for architects, engineers and construction workers around the world, it inspires another emotion - awe. The project is very detailed. If it is not building information modeling technology, it will not be realized in a short time, the cost is low, and the error space is small. Let's see how BIM enables structural engineers, steel detailing designers and construction teams to combine the Bird's Nest with the Olympics in a timely manner.

Important statistics for Bird's Nest

* 332 meters long, 297 meters wide, 69 meters high

* Floor area: 204,278 square meters.

*The structure contains 36 km of unwrapped steel length

*The largest steel truss spans 343 meters

Bird's Nest Challenge

For some people, it may look like a tangled ball of discarded wires. For those who build it, there are far more than finding leftovers. Some of the problems with modeling information modeling quickly helped structural engineers and steel structure detailers:

*weight is minimized

* Reduce construction costs

* saddle-shaped, oval roof

*The outer surface is inclined outwards by 13 degrees vertically

* As you can see in the vital statistics, the largest steel beam is 343 meters long and the structure uses 36 kilometers of unwrapped steel length.

How does BIM help?

The roof is one of the most difficult parts of a construction engineer. In their calculations, the strong weight of steel is shown, and a completely steel roof is simply impossible. Chinese steelmakers and manufacturers [both companies - Huning and Jinggong] spent more than a year making symmetric three-dimensional views of connections and members. Good building information modeling software has mirroring capabilities, which makes the project a lot of work. Connections are almost impossible to visually visualize - but this is not required, as the 3D modeling of architecture emerges.

If there is no BIM, another major function of Bird's Nest is the buffering system inside the facade of the building. This is not only a support that must be considered in design; structural engineers use building information models to predict how structures respond to wind, sunlight, and weather. The solution is to strategically fill some space with ETFE, a translucent material used to build Bubble Building #39; also in the China Olympic Park.

Obviously, the appearance of the building is the most important factor. It is different, unusual and culturally significant; it is also an "anti-technical expert" and an "anti-technical expert". [According to the designer's statement]. This is not possible without the help of a building information model.

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